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United States Patent | 5,638,365 |
Duault ,   et al. | June 10, 1997 |
A method dynamically changes the bit rate or bandwidth of constant bit rate data structures in an Asynchronous Transfer Mode (ATM) communications environment. The method defines within a data channel a Change indicator (CI) indicative of an end user's request for a bit rate change within said data structures. The Change Indicator is continuously transmitted from a source side to a destination side in the ATM environment, along with the data structures on said data channel. Upon receipt at the destination side of a user's request of a bit rate change, the destination side modifies the value of said Change Indicator. The source side, acknowledges the modification of the value of the Change Indicator, whereby the transmission of data structures continues on the data channel with a new constant bit rate.
Inventors: | Duault; Maurice (Saint Laurent du Var, FR); Galand; Claude (Cagnes sur Mer, FR) |
Assignee: | International Business Machines Corporation (Armonk, NY) |
Appl. No.: | 526344 |
Filed: | September 11, 1995 |
Sep 19, 1994[EP] | 94480088 |
Current U.S. Class: | 370/236.1; 370/426; 370/469 |
Intern'l Class: | H04J 003/26; H04L 012/56 |
Field of Search: | 370/80,82,84,85.7,94.1,94.2,95.1,95.3 375/225 |
5280476 | Jan., 1994 | Kojima et al. | 370/94. |
5313467 | May., 1994 | Varghese et al. | 370/60. |
5414707 | May., 1995 | Johnston et al. | 370/94. |
5541926 | Jul., 1996 | Saito et al. | 370/94. |
Foreign Patent Documents | |||
0214352 | Aug., 1985 | EP | . |
XIV International Switching Symposium, vol. 2, 25 Oct. 1992, Yokohama pp. 7-11, XP 000337692 D.P. Tranchier, et al Fast Bandwidth Allocation in ATM Networks. IEEE International Conference on Communications, vol. 2 of 4, 1990 Georgia pp. 439-442, XP 000169724, W. Wang et al, Bandwidth Allocation for ATM Networks. Computer Networks and ISDN Systems, vol. 24, No. 15, May 1992 Amsterdam, pp. 321-334, XP 000264212 P.E. Boyer et al "A reservation principle with applications to the ATM traffic control". Data Communications, vol. 23, No. 4, Mar. 1994 New York, pp. 55-60, XP 000432073 S. Saunders "ATM Forum Ponders Congestion Control Options". |